forked from OSchip/llvm-project
442 lines
14 KiB
C++
442 lines
14 KiB
C++
//===-- DWARFDie.cpp ------------------------------------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/DebugInfo/DWARF/DWARFDie.h"
|
|
#include "SyntaxHighlighting.h"
|
|
#include "llvm/DebugInfo/DWARF/DWARFCompileUnit.h"
|
|
#include "llvm/DebugInfo/DWARF/DWARFContext.h"
|
|
#include "llvm/DebugInfo/DWARF/DWARFDebugAbbrev.h"
|
|
#include "llvm/DebugInfo/DWARF/DWARFDebugInfoEntry.h"
|
|
#include "llvm/DebugInfo/DWARF/DWARFFormValue.h"
|
|
#include "llvm/Support/DataTypes.h"
|
|
#include "llvm/Support/Debug.h"
|
|
#include "llvm/Support/Dwarf.h"
|
|
#include "llvm/Support/Format.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
|
|
using namespace llvm;
|
|
using namespace dwarf;
|
|
using namespace syntax;
|
|
|
|
namespace {
|
|
static void dumpApplePropertyAttribute(raw_ostream &OS, uint64_t Val) {
|
|
OS << " (";
|
|
do {
|
|
uint64_t Shift = countTrailingZeros(Val);
|
|
assert(Shift < 64 && "undefined behavior");
|
|
uint64_t Bit = 1ULL << Shift;
|
|
auto PropName = ApplePropertyString(Bit);
|
|
if (!PropName.empty())
|
|
OS << PropName;
|
|
else
|
|
OS << format("DW_APPLE_PROPERTY_0x%" PRIx64, Bit);
|
|
if (!(Val ^= Bit))
|
|
break;
|
|
OS << ", ";
|
|
} while (true);
|
|
OS << ")";
|
|
}
|
|
|
|
static void dumpRanges(raw_ostream &OS, const DWARFAddressRangesVector& Ranges,
|
|
unsigned AddressSize, unsigned Indent) {
|
|
if (Ranges.empty())
|
|
return;
|
|
|
|
for (const auto &Range: Ranges) {
|
|
OS << '\n';
|
|
OS.indent(Indent);
|
|
OS << format("[0x%0*" PRIx64 " - 0x%0*" PRIx64 ")",
|
|
AddressSize*2, Range.first,
|
|
AddressSize*2, Range.second);
|
|
}
|
|
}
|
|
|
|
static void dumpAttribute(raw_ostream &OS, const DWARFDie &Die,
|
|
uint32_t *OffsetPtr, dwarf::Attribute Attr,
|
|
dwarf::Form Form, unsigned Indent) {
|
|
if (!Die.isValid())
|
|
return;
|
|
const char BaseIndent[] = " ";
|
|
OS << BaseIndent;
|
|
OS.indent(Indent+2);
|
|
auto attrString = AttributeString(Attr);
|
|
if (!attrString.empty())
|
|
WithColor(OS, syntax::Attribute) << attrString;
|
|
else
|
|
WithColor(OS, syntax::Attribute).get() << format("DW_AT_Unknown_%x", Attr);
|
|
|
|
auto formString = FormEncodingString(Form);
|
|
if (!formString.empty())
|
|
OS << " [" << formString << ']';
|
|
else
|
|
OS << format(" [DW_FORM_Unknown_%x]", Form);
|
|
|
|
DWARFUnit *U = Die.getDwarfUnit();
|
|
DWARFFormValue formValue(Form);
|
|
|
|
if (!formValue.extractValue(U->getDebugInfoExtractor(), OffsetPtr, U))
|
|
return;
|
|
|
|
OS << "\t(";
|
|
|
|
StringRef Name;
|
|
std::string File;
|
|
auto Color = syntax::Enumerator;
|
|
if (Attr == DW_AT_decl_file || Attr == DW_AT_call_file) {
|
|
Color = syntax::String;
|
|
if (const auto *LT = U->getContext().getLineTableForUnit(U))
|
|
if (LT->getFileNameByIndex(formValue.getAsUnsignedConstant().getValue(), U->getCompilationDir(), DILineInfoSpecifier::FileLineInfoKind::AbsoluteFilePath, File)) {
|
|
File = '"' + File + '"';
|
|
Name = File;
|
|
}
|
|
} else if (Optional<uint64_t> Val = formValue.getAsUnsignedConstant())
|
|
Name = AttributeValueString(Attr, *Val);
|
|
|
|
if (!Name.empty())
|
|
WithColor(OS, Color) << Name;
|
|
else if (Attr == DW_AT_decl_line || Attr == DW_AT_call_line)
|
|
OS << *formValue.getAsUnsignedConstant();
|
|
else
|
|
formValue.dump(OS);
|
|
|
|
// We have dumped the attribute raw value. For some attributes
|
|
// having both the raw value and the pretty-printed value is
|
|
// interesting. These attributes are handled below.
|
|
if (Attr == DW_AT_specification || Attr == DW_AT_abstract_origin) {
|
|
if (const char *Name = Die.getAttributeValueAsReferencedDie(Attr).getName(DINameKind::LinkageName))
|
|
OS << " \"" << Name << '\"';
|
|
} else if (Attr == DW_AT_APPLE_property_attribute) {
|
|
if (Optional<uint64_t> OptVal = formValue.getAsUnsignedConstant())
|
|
dumpApplePropertyAttribute(OS, *OptVal);
|
|
} else if (Attr == DW_AT_ranges) {
|
|
dumpRanges(OS, Die.getAddressRanges(), U->getAddressByteSize(),
|
|
sizeof(BaseIndent)+Indent+4);
|
|
}
|
|
|
|
OS << ")\n";
|
|
}
|
|
|
|
} // end anonymous namespace
|
|
|
|
bool DWARFDie::isSubprogramDIE() const {
|
|
return getTag() == DW_TAG_subprogram;
|
|
}
|
|
|
|
bool DWARFDie::isSubroutineDIE() const {
|
|
auto Tag = getTag();
|
|
return Tag == DW_TAG_subprogram || Tag == DW_TAG_inlined_subroutine;
|
|
}
|
|
|
|
Optional<DWARFFormValue>
|
|
DWARFDie::getAttributeValue(dwarf::Attribute Attr) const {
|
|
if (!isValid())
|
|
return None;
|
|
auto AbbrevDecl = getAbbreviationDeclarationPtr();
|
|
if (AbbrevDecl)
|
|
return AbbrevDecl->getAttributeValue(getOffset(), Attr, *U);
|
|
return None;
|
|
}
|
|
|
|
const char *DWARFDie::getAttributeValueAsString(dwarf::Attribute Attr,
|
|
const char *FailValue) const {
|
|
auto FormValue = getAttributeValue(Attr);
|
|
if (!FormValue)
|
|
return FailValue;
|
|
Optional<const char *> Result = FormValue->getAsCString();
|
|
return Result.hasValue() ? Result.getValue() : FailValue;
|
|
}
|
|
|
|
uint64_t DWARFDie::getAttributeValueAsAddress(dwarf::Attribute Attr,
|
|
uint64_t FailValue) const {
|
|
if (auto Value = getAttributeValueAsAddress(Attr))
|
|
return *Value;
|
|
return FailValue;
|
|
}
|
|
|
|
Optional<uint64_t>
|
|
DWARFDie::getAttributeValueAsAddress(dwarf::Attribute Attr) const {
|
|
if (auto FormValue = getAttributeValue(Attr))
|
|
return FormValue->getAsAddress();
|
|
return None;
|
|
}
|
|
|
|
int64_t DWARFDie::getAttributeValueAsSignedConstant(dwarf::Attribute Attr,
|
|
int64_t FailValue) const {
|
|
if (auto Value = getAttributeValueAsSignedConstant(Attr))
|
|
return *Value;
|
|
return FailValue;
|
|
}
|
|
|
|
Optional<int64_t>
|
|
DWARFDie::getAttributeValueAsSignedConstant(dwarf::Attribute Attr) const {
|
|
if (auto FormValue = getAttributeValue(Attr))
|
|
return FormValue->getAsSignedConstant();
|
|
return None;
|
|
}
|
|
|
|
uint64_t
|
|
DWARFDie::getAttributeValueAsUnsignedConstant(dwarf::Attribute Attr,
|
|
uint64_t FailValue) const {
|
|
if (auto Value = getAttributeValueAsUnsignedConstant(Attr))
|
|
return *Value;
|
|
return FailValue;
|
|
}
|
|
|
|
|
|
Optional<uint64_t>
|
|
DWARFDie::getAttributeValueAsUnsignedConstant(dwarf::Attribute Attr) const {
|
|
if (auto FormValue = getAttributeValue(Attr))
|
|
return FormValue->getAsUnsignedConstant();
|
|
return None;
|
|
}
|
|
|
|
uint64_t DWARFDie::getAttributeValueAsReference(dwarf::Attribute Attr,
|
|
uint64_t FailValue) const {
|
|
if (auto Value = getAttributeValueAsReference(Attr))
|
|
return *Value;
|
|
return FailValue;
|
|
}
|
|
|
|
|
|
Optional<uint64_t>
|
|
DWARFDie::getAttributeValueAsReference(dwarf::Attribute Attr) const {
|
|
if (auto FormValue = getAttributeValue(Attr))
|
|
return FormValue->getAsReference();
|
|
return None;
|
|
}
|
|
|
|
uint64_t DWARFDie::getAttributeValueAsSectionOffset(dwarf::Attribute Attr,
|
|
uint64_t FailValue) const {
|
|
if (auto Value = getAttributeValueAsSectionOffset(Attr))
|
|
return *Value;
|
|
return FailValue;
|
|
}
|
|
|
|
Optional<uint64_t>
|
|
DWARFDie::getAttributeValueAsSectionOffset(dwarf::Attribute Attr) const {
|
|
if (auto FormValue = getAttributeValue(Attr))
|
|
return FormValue->getAsSectionOffset();
|
|
return None;
|
|
}
|
|
|
|
|
|
DWARFDie
|
|
DWARFDie::getAttributeValueAsReferencedDie(dwarf::Attribute Attr) const {
|
|
auto SpecRef = getAttributeValueAsReference(Attr);
|
|
if (SpecRef) {
|
|
auto SpecUnit = U->getUnitSection().getUnitForOffset(*SpecRef);
|
|
if (SpecUnit)
|
|
return SpecUnit->getDIEForOffset(*SpecRef);
|
|
}
|
|
return DWARFDie();
|
|
}
|
|
|
|
Optional<uint64_t>
|
|
DWARFDie::getRangesBaseAttribute() const {
|
|
auto Result = getAttributeValueAsSectionOffset(DW_AT_rnglists_base);
|
|
if (Result)
|
|
return Result;
|
|
return getAttributeValueAsSectionOffset(DW_AT_GNU_ranges_base);
|
|
}
|
|
|
|
Optional<uint64_t> DWARFDie::getHighPC(uint64_t LowPC) const {
|
|
if (auto FormValue = getAttributeValue(DW_AT_high_pc)) {
|
|
if (auto Address = FormValue->getAsAddress()) {
|
|
// High PC is an address.
|
|
return Address;
|
|
}
|
|
if (auto Offset = FormValue->getAsUnsignedConstant()) {
|
|
// High PC is an offset from LowPC.
|
|
return LowPC + *Offset;
|
|
}
|
|
}
|
|
return None;
|
|
}
|
|
|
|
bool DWARFDie::getLowAndHighPC(uint64_t &LowPC, uint64_t &HighPC) const {
|
|
auto LowPcAddr = getAttributeValueAsAddress(DW_AT_low_pc);
|
|
if (!LowPcAddr)
|
|
return false;
|
|
if (auto HighPcAddr = getHighPC(*LowPcAddr)) {
|
|
LowPC = *LowPcAddr;
|
|
HighPC = *HighPcAddr;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
DWARFAddressRangesVector
|
|
DWARFDie::getAddressRanges() const {
|
|
if (isNULL())
|
|
return DWARFAddressRangesVector();
|
|
// Single range specified by low/high PC.
|
|
uint64_t LowPC, HighPC;
|
|
if (getLowAndHighPC(LowPC, HighPC)) {
|
|
return DWARFAddressRangesVector(1, std::make_pair(LowPC, HighPC));
|
|
}
|
|
// Multiple ranges from .debug_ranges section.
|
|
auto RangesOffset = getAttributeValueAsSectionOffset(DW_AT_ranges);
|
|
if (RangesOffset) {
|
|
DWARFDebugRangeList RangeList;
|
|
if (U->extractRangeList(*RangesOffset, RangeList))
|
|
return RangeList.getAbsoluteRanges(U->getBaseAddress());
|
|
}
|
|
return DWARFAddressRangesVector();
|
|
}
|
|
|
|
void
|
|
DWARFDie::collectChildrenAddressRanges(DWARFAddressRangesVector& Ranges) const {
|
|
if (isNULL())
|
|
return;
|
|
if (isSubprogramDIE()) {
|
|
const auto &DIERanges = getAddressRanges();
|
|
Ranges.insert(Ranges.end(), DIERanges.begin(), DIERanges.end());
|
|
}
|
|
|
|
DWARFDie Child = getFirstChild();
|
|
while (Child) {
|
|
Child.collectChildrenAddressRanges(Ranges);
|
|
Child = Child.getSibling();
|
|
}
|
|
}
|
|
|
|
bool DWARFDie::addressRangeContainsAddress(const uint64_t Address) const {
|
|
for (const auto& R : getAddressRanges()) {
|
|
if (R.first <= Address && Address < R.second)
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
const char *
|
|
DWARFDie::getSubroutineName(DINameKind Kind) const {
|
|
if (!isSubroutineDIE())
|
|
return nullptr;
|
|
return getName(Kind);
|
|
}
|
|
|
|
const char *
|
|
DWARFDie::getName(DINameKind Kind) const {
|
|
if (!isValid() || Kind == DINameKind::None)
|
|
return nullptr;
|
|
const char *name = nullptr;
|
|
// Try to get mangled name only if it was asked for.
|
|
if (Kind == DINameKind::LinkageName) {
|
|
if ((name = getAttributeValueAsString(DW_AT_MIPS_linkage_name, nullptr)))
|
|
return name;
|
|
if ((name = getAttributeValueAsString(DW_AT_linkage_name, nullptr)))
|
|
return name;
|
|
}
|
|
if ((name = getAttributeValueAsString(DW_AT_name, nullptr)))
|
|
return name;
|
|
// Try to get name from specification DIE.
|
|
DWARFDie SpecDie = getAttributeValueAsReferencedDie(DW_AT_specification);
|
|
if (SpecDie && (name = SpecDie.getName(Kind)))
|
|
return name;
|
|
// Try to get name from abstract origin DIE.
|
|
DWARFDie AbsDie = getAttributeValueAsReferencedDie(DW_AT_abstract_origin);
|
|
if (AbsDie && (name = AbsDie.getName(Kind)))
|
|
return name;
|
|
return nullptr;
|
|
}
|
|
|
|
void DWARFDie::getCallerFrame(uint32_t &CallFile, uint32_t &CallLine,
|
|
uint32_t &CallColumn) const {
|
|
CallFile = getAttributeValueAsUnsignedConstant(DW_AT_call_file, 0);
|
|
CallLine = getAttributeValueAsUnsignedConstant(DW_AT_call_line, 0);
|
|
CallColumn = getAttributeValueAsUnsignedConstant(DW_AT_call_column, 0);
|
|
}
|
|
|
|
void DWARFDie::dump(raw_ostream &OS, unsigned RecurseDepth,
|
|
unsigned Indent) const {
|
|
if (!isValid())
|
|
return;
|
|
DataExtractor debug_info_data = U->getDebugInfoExtractor();
|
|
const uint32_t Offset = getOffset();
|
|
uint32_t offset = Offset;
|
|
|
|
if (debug_info_data.isValidOffset(offset)) {
|
|
uint32_t abbrCode = debug_info_data.getULEB128(&offset);
|
|
WithColor(OS, syntax::Address).get() << format("\n0x%8.8x: ", Offset);
|
|
|
|
if (abbrCode) {
|
|
auto AbbrevDecl = getAbbreviationDeclarationPtr();
|
|
if (AbbrevDecl) {
|
|
auto tagString = TagString(getTag());
|
|
if (!tagString.empty())
|
|
WithColor(OS, syntax::Tag).get().indent(Indent) << tagString;
|
|
else
|
|
WithColor(OS, syntax::Tag).get().indent(Indent)
|
|
<< format("DW_TAG_Unknown_%x", getTag());
|
|
|
|
OS << format(" [%u] %c\n", abbrCode,
|
|
AbbrevDecl->hasChildren() ? '*' : ' ');
|
|
|
|
// Dump all data in the DIE for the attributes.
|
|
for (const auto &AttrSpec : AbbrevDecl->attributes()) {
|
|
dumpAttribute(OS, *this, &offset, AttrSpec.Attr, AttrSpec.Form,
|
|
Indent);
|
|
}
|
|
|
|
DWARFDie child = getFirstChild();
|
|
if (RecurseDepth > 0 && child) {
|
|
while (child) {
|
|
child.dump(OS, RecurseDepth-1, Indent+2);
|
|
child = child.getSibling();
|
|
}
|
|
}
|
|
} else {
|
|
OS << "Abbreviation code not found in 'debug_abbrev' class for code: "
|
|
<< abbrCode << '\n';
|
|
}
|
|
} else {
|
|
OS.indent(Indent) << "NULL\n";
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void DWARFDie::getInlinedChainForAddress(
|
|
const uint64_t Address, SmallVectorImpl<DWARFDie> &InlinedChain) const {
|
|
if (isNULL())
|
|
return;
|
|
DWARFDie DIE(*this);
|
|
while (DIE) {
|
|
// Append current DIE to inlined chain only if it has correct tag
|
|
// (e.g. it is not a lexical block).
|
|
if (DIE.isSubroutineDIE())
|
|
InlinedChain.push_back(DIE);
|
|
|
|
// Try to get child which also contains provided address.
|
|
DWARFDie Child = DIE.getFirstChild();
|
|
while (Child) {
|
|
if (Child.addressRangeContainsAddress(Address)) {
|
|
// Assume there is only one such child.
|
|
break;
|
|
}
|
|
Child = Child.getSibling();
|
|
}
|
|
DIE = Child;
|
|
}
|
|
// Reverse the obtained chain to make the root of inlined chain last.
|
|
std::reverse(InlinedChain.begin(), InlinedChain.end());
|
|
}
|
|
|
|
DWARFDie DWARFDie::getParent() const {
|
|
if (isValid())
|
|
return U->getParent(Die);
|
|
return DWARFDie();
|
|
}
|
|
|
|
DWARFDie DWARFDie::getSibling() const {
|
|
if (isValid())
|
|
return U->getSibling(Die);
|
|
return DWARFDie();
|
|
}
|